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目的探讨2×4矫治器配合下后牙面树脂垫早期阻断矫治乳前牙反的临床效果。方法乳牙期前牙反患者46例,平均年龄(4.2±0.6)岁,采用2×4矫治器配合下后牙面树脂垫高咬合进行早期阻断矫治。配对t检验比较头颅定位侧位片的牙、颌、面测量值在矫治前后的差异。结果矫治后所有患者乳前牙反解除。与矫治前相比,上中切牙角(UA-SN)增加11.57°(P<0.001),上牙弓长度(is-ms)增加2.26 mm(P<0.01);下中切牙角(LA-MP)减小4.38°(P<0.01),下牙弓长度(ii-mi)减少1.04 mm(P<0.01)。ANB增大1.44°。结论 2×4矫治器配合下后牙面树脂垫是早期阻断矫治乳前牙反的有效方法,患儿易于配合。
Objective To investigate the clinical effect of 2 × 4 appliance combined with anterior occlusal resin pad in the treatment of antegrade decidua. Methods Forty - six patients with anterior crossbite of deciduous teeth were studied. The average age was (4.2 ± 0.6) years old. The patients were treated with 2 × 4 appliance and occlusal anterior occlusion. Paired t test was used to compare the difference of the measured values of the teeth, jaw and surface of the cranial positioning flaps before and after treatment. Results All patients after treatment of ankle anteversion dislocation. The UA-SN increased by 11.57 ° (P <0.001) and the is-ms increased by 2.26 mm (P <0.01) compared with that before treatment. The median incisor angle -MP) decreased by 4.38 ° (P <0.01), while the length of the lower arch (ii-mi) decreased by 1.04 mm (P <0.01). ANB increases by 1.44 °. Conclusion 2 × 4 appliance combined with posterior teeth facet resin pad is an effective method to block the treatment of antelectasis of the anterior teeth of the anterior teeth. Children are easy to cooperate with.